,AAA,AA,A,BBB,BB,B,CCC,D
AAA,1.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000
AA,0.000000,0.992432,0.007568,0.000000,0.000000,0.000000,0.000000,0.000000
A,0.000000,0.009289,0.962951,0.027760,0.000000,0.000000,0.000000,0.000000
BBB,0.000000,0.000000,0.086797,0.866742,0.043466,0.000000,0.002996,0.000000
BB,0.000000,0.000000,0.052682,0.000000,0.789409,0.094704,0.010523,0.052682
B,0.000000,0.000000,0.000000,0.000000,0.000000,0.850000,0.150000,0.000000
CCC,0.000000,0.000000,0.001000,0.002000,0.003000,0.020000,0.974000,0.000000
D,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,0.000000,1.000000